Pierre Denis, The Argentine Republic: Its Development and Progress
“ Their inclination remains steep, and their waters continue to plough up coarse sediment; and everywhere, up to the fringes of the valleys, the fluting of the sandstone and steepness of the cliffs bear witness, like the edges of the hamadas of the Sahara, to some other form of erosion than that effected by running water—the influence on the country of the westerly winds. On the tableland the wind polishes the rounded pebbles, makes facets on them, and gives them the colouring of the desert. ”
